(bug 53678) add compatiblity for change dispatcher with badges

also added missing message key 'wikibase-comment-add'

Change-Id: I8ad2e4d3f21b9dcf1b6a6b18bc8a6d97a3ab4da1
Merge "(bug 53678) add compatiblity for change dispatcher with badges" into mw1.22-wmf14